JP4733250B2 - Coil lead cutting method and cutting apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coil lead cutting method and a cutting apparatus for cutting a coil lead portion.
[0002]
[Prior art]
In the winding device, a coil is formed by winding a wire around a winding core, and it is necessary to cut the lead portions at both ends of the coil. Conventionally, such cutting of the coil lead is performed by a cutter of a cutting device provided in the winding device. Specifically, the blade portion of the cutter is applied to the cutting portion of the lead portion at a right angle to the operation direction, and the lead portion is cut by pressing the cutter in the operation direction.
[0003]
[Problems to be solved by the invention]
However, in such a conventional cut, since resistance to cutting is large and a large force is required for cutting, it is difficult to cut with a clean cut surface. In the case of a thin wire rod, the wire rod may be cut at a portion other than the cutting portion due to the pressing force by the cutter. In order to deal with such a problem, it is conceivable to provide a cradle for the lead part and perform cutting with a cutter on the cradle. In this case, the contact state between the cradle and the lead part is appropriately set. It was not easy to keep.
[0004]
The present invention has been made paying attention to such problems. In the coil lead cutting method and cutting apparatus for cutting the coil lead portion, the cutting can be smoothly performed and the cut surface is finished cleanly. It aims to provide what can be.
[0005]
[Means for Solving the Problems]
In a first aspect of the present invention, in the coil lead cutting method in which the lead portion of the coil wound around the winding core is cut with a cutter, the pressing force acting on the lead portion from the cutter causes the lead portion to act on the winding core. The blade portion of the cutter was tilted in the operation direction at the time of cutting so as to be a resultant force of a force in a winding direction and a force in a direction in which the coil was pressed against the proximal end of the core .
[0006]
In the second invention, against the force acting at the time of cutting based on the inclination of the blade portion, the wire rod at the base end of the lead portion is supported from the opposite side to the direction in which the blade portion of the cutter faces. .
[0007]
In the third aspect of the invention, the wire rod at the base end of the lead portion is supported by the support surface with which the coil end portion is in contact with the force acting at the time of cutting based on the inclination of the blade portion.
[0008]
In the fourth invention, the wire rod at the base end of the lead portion is supported by the adjacent wire rod against the force acting at the time of cutting based on the inclination of the blade portion.
[0009]
In the fifth invention, in the coil lead cutting device comprising a gripping means for gripping the lead portion of the coil wound around the winding core, a cutter for cutting the lead portion between the gripping means and the coil, The blade portion of the cutter has a pressing force acting on the lead portion from the cutter, a force in a direction to wind the lead portion around the core, and a force in a direction to press the coil against the proximal end of the core. It is tilted in the operating direction at the time of cutting so as to consist of the resultant force .
[0010]
In the sixth invention, the wire material at the base end of the lead portion is supported from the opposite side to the direction in which the blade portion of the cutter faces with respect to the force acting at the time of cutting based on the inclination of the blade portion. .
[0011]
In the seventh invention, the wire material at the base end of the lead portion is supported by the support surface with which the coil end portion is in contact with the force based on the inclination of the blade portion acting at the time of cutting.
[0012]
In the eighth invention, the wire rod at the base end of the lead portion is supported by the adjacent wire rod against the force based on the inclination of the blade portion acting at the time of cutting.
[0017]
Operation and effect of the invention
In the cutting method of the first invention and the cutting device of the fifth invention, the cutter for cutting the lead portion has an inclination with respect to the operation direction of the cutter. The contact distance between the cutting edge) and the cross section of the lead portion can be increased, and the pressing force applied to the cutter can be reduced accordingly. Therefore, the lead portion is cut smoothly, the cut surface is clean, and the wire rod is not cut at portions other than the portion of the lead portion to be cut.
[0018]
In the cutting methods of the second to fourth inventions and the cutting devices of the sixth to eighth inventions, a force perpendicular to the operation direction of the cutter based on the inclination of the blade part acts when cutting the lead part. On the other hand, the wire rod at the base end of the lead portion is supported from the opposite side. For example, in 3rd, 7th invention, it is supported by a support surface, and in 4th, 8th invention, it is supported by the adjacent wire. Therefore, the coil is positionally stable at the time of cutting, and a stable cutting operation can be performed.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0022]
FIG. 1 shows the overall configuration of the winding device 1. As illustrated, the winding device 1 includes a peeling device 10, a flyer type winding mechanism 20, an index device 30, and a cutting device 40 on a base 2.
[0023]
The stripping device 10 is a device for stripping the insulating coating on the surface of the wire 3, and the wire 3 from a wire source (not shown) is first guided to the stripping device 10. In the peeling apparatus 10, the insulating coating at the position that becomes the coil terminal portion of the wire 3 is peeled off. A fryer type winding mechanism 20 is provided adjacent to the peeling device 10.
[0024]
As shown in FIG. 2, the flyer-type winding mechanism 20 includes a spindle support base 21, a screw feed mechanism 22, a spindle 23, a flyer 24, a nozzle 25, a spindle drive motor 26, and the like.
[0025]
The spindle support base 21 is installed on the base 2 so that it can be moved forward and backward by the screw feed mechanism 22. The spindle 23 is pivotally supported by the spindle support 21 so as to be rotatable in the forward and backward direction of the spindle support 21.
[0026]
A flyer 24 is fixed to the tip of the spindle 23. A nozzle 25 is fixed to the flyer 24 by being eccentric from the axis of the spindle 23. The wire 3 from the peeling device 10 is guided from the proximal end side of the spindle 23 to a hollow portion formed on the same axis as the spindle 23, and is further guided to the nozzle 24 from an opening formed on the side surface of the spindle 23.
[0027]
The spindle drive motor 26 is a rotation drive means for the spindle 23, and a pulley 27 fixed to the rotation shaft of the spindle drive motor 26 is linked to a pulley 28 fixed to the outer periphery of the spindle 23 by a belt 29. Yes.
[0028]
The index device 30 is provided adjacent to the flyer-type winding mechanism 20 and includes a pedestal 31, a rotation center shaft 32, a rotating body 33, a plurality (eight) of core cores 34, a core 35, and the like. .
[0029]
The pedestal 31 is fixed to the base 2, and a rotation center shaft 32 extends from the pedestal 31 vertically upward from the pedestal 31. The rotating body 33 is provided on the same axis as the central shaft 32 and is rotatable about the axis. The rotating body 33 is rotationally driven by a driving mechanism (not shown).
[0030]
The rotating body 33 is formed of a substantially regular octagonal frame, and the core accommodating cylinders 34 are fixed to the eight side surfaces thereof. The cores 35 are accommodated in these core accommodating cylinders 34 so as to be movable forward and backward in the axial direction. A portion where each core 35 protrudes from the core housing cylinder 34 to the outside of the rotating body 33 becomes a winding portion around which the wire 3 is wound.
[0031]
The winding core 34 changes its position along with the rotation of the rotating body 33, the winding position directly facing the flyer type winding mechanism 20, the wire cutting position rotated 180 degrees from this winding position, and further rotated 180 degrees from this wire cutting position. The position is sequentially determined at the coil discharge position and the like.
[0032]
The winding position is a position where the winding work is performed, and the nozzle 25 that feeds the wire 3 around the winding core 35A at the winding position revolves along with the rotation of the spindle 23, thereby winding the winding core 35A. A wire is wound around the turning part. In this case, as the winding progresses, the flyer type winding mechanism 20 is moved backward (by moving in the right direction in the figure) so that the winding is directed from the root side to the tip side of the winding portion. It has come to be done.
[0033]
Note that a tie-down pin 39 is provided on the pedestal 31 side, and in the first winding operation, the end portion of the wire 3 fed out from the nozzle 25 is entangled with the tie-down pin 39. The winding work is performed.
[0034]
The coil discharge position is a position where the coil 4 that has been wound up and the lead portion has been cut is discharged, and the core 35C at this coil discharge position is retracted into the core storage tube 34, thereby losing support. The coil 4 falls into the coil collection box 5.
[0035]
This mechanism will be described in detail with reference to FIG. The base end side of each core 35 protrudes from the core housing cylinder 34 to the inside of the rotating body 33, and this base end portion is a flange portion 36. A spring 37 is provided between the flange portion 36 and the inner end surface of the core accommodating cylinder 34. The spring 37 biases the flange portion 36 toward the rotation center shaft 32, and the flange portion 36 is in contact with the outer peripheral surface of the rotation center shaft 32.
[0036]
The outer peripheral surface of the rotation center shaft 32 is a cam surface, and the place where the flange portion 36 of the winding core 35C at the coil discharge position contacts is a recess 38 that is recessed from the other portions. As a result, the core 35 </ b> C that has moved to the coil discharge position is retracted into the core housing tube 34 by the biasing force of the spring 37, and the tip (winding portion) of the winding 35 </ b> C is wound around the core housing tube 34. Stored inside. In this case, the coil 4 hits the outer end face of the core housing cylinder 34 and is left behind on the spot. As a result, the coil 4 loses support and falls to the lower coil collection box 5.
[0037]
As shown in FIG. 2, the wire cutting position is a position directly facing the cutting device 40, and the lead portions at both ends of the coil wound around the winding portion of the winding core 35 </ b> B at the wire cutting position are the cutting device. Cut by 40. That is, since the wire 3 wound around the winding core 35 is not cut, it is continuously connected from the winding core 35A at the winding position to the winding core 35B at the wire cutting position. Cut at the wire cutting position.
[0038]
The cutting device 40 includes a pedestal 41, a main body portion 42, a cutter support member 43, two cutters 44 and 45, two clamp devices 46 and 47, and the like.
[0039]
The pedestal 41 constitutes the base of the cutting device 40 and is fixed on the base 2. The main body 42 can be moved forward and backward along the rail 41 </ b> A installed on the pedestal 41 with respect to the winding core 35 </ b> B at the wire rod cutting position of the index device 30. This forward and backward movement is performed by a screw feed mechanism 48 accommodated in the base 41.
[0040]
The main body 42 is a substantially L-shaped member, and the cutter support member 43 can be moved up and down along a rail 42 </ b> A installed at an upright portion thereof. This lifting operation is driven by a cylinder (not shown).
[0041]
A pair of cutters 44 and 45 are attached to the lower portion of the cutter support member 43 with the blade portions 44A and 45B facing downward. These cutters 44 and 45 cut the winding start side lead portion 51 and the winding end side lead portion 52 of the coil 4 on the outer periphery of the winding core 35B, respectively, and when the cutting device 40 advances to the winding core 35B side. The blade portions 44A and 45A are provided substantially in parallel so as to be positioned above the cutting positions of the winding start side lead portion 51 and the winding end side lead portion 52, respectively. In addition, the lead portion in the rotation direction of the rotating member 33 with respect to each core 35 is the winding start side lead portion 51, and the lead portion on the opposite side is the winding end side lead portion 52.
[0042]
A pair of clamping devices 45 and 46 are provided below the cutter support member 43. As shown in FIG. 4, these clamping devices 44 and 45 hold the winding start side lead portion 51 and the winding end side lead portion 52 of the coil 4 on the outer periphery of the winding core 35 during the cutting operation of the coil lead portion, respectively. When the cutting device 40 moves forward, the lead portions 51 and 52 at both ends of the coil 4 on the outer periphery of the winding core 35B are arranged so as to be able to just hold. By this grip, the lead portion is appropriately supported against the pressing force of the cutters 44 and 45. Note that the lead portion on the winding start side (coil discharge position side) of the coil 4 on the outer periphery of the winding core 35B is cut from the previous coil 4 but extends substantially horizontally due to its rigidity. The device 46 can be gripped well.
[0043]
As shown in FIG. 5, the blade portions 44 </ b> A and 45 </ b> A of the cutters 44 and 45 are directed toward the base end side (right side in the drawing) of the core 35 </ b> B with respect to the vertical direction that is the operation direction of the cutters 44 and 45. Tilted. By inclining the blade portions 44A and 45A in this way, the load applied to the cutting can be reduced, smooth cutting can be performed, and the coil 4 can be appropriately supported at the time of cutting, so that stable cutting can be performed.
[0044]
More specifically, since the blade portions 44A and 45A of the cutters 44 and 45 are inclined, the contact distance between the blade portions 44A and 45A and the cross-section of the lead portion when cutting the lead portion can be increased. The pressing force applied to the cutters 44 and 45 can be small.
[0045]
Further, since the blade portions 44A and 45A are directed obliquely, a component force of the pressing force acts on the lead portions 51 and 52 sideways (rightward in the figure) at the time of cutting. The wire rod 4A at the proximal end of the side lead portion 51 and the wire rod 4B at the proximal end of the winding end side lead portion 52 are pressed against the end surface 34A of the core housing tube 34 and the adjacent wire rod 4C, respectively, and are appropriately supported. That is, the wire 4A at the base end of the winding start side lead portion 51 is in contact with the outer end surface 34A of the core accommodating cylinder 34, but the component force of the pressing force acts to press the wire 4A against the outer end surface 34A. Further, since the wire 4B at the base end of the winding end side lead portion 52 has another wire 4C constituting the coil 4 in the direction in which the component force of the pressing force acts, it is pressed against the wire 4C. Thereby, the positions of the lead portions 51 and 52 are stabilized at the time of cutting, and, for example, the coil 4 does not move in the direction of coming out of the core 35B due to the component force of the pressing force at the time of cutting, and stable cutting work can be performed.
[0046]
Next, the operation will be described.
[0047]
In the winding device, the wire 3 from which the insulating film at a predetermined position is peeled off by the peeling device 10 is guided to the flyer-type winding mechanism 20, and the winding core 35 </ b> A indexed to the winding position of the index device 30. Is wound. The winding core 35 </ b> A wound around the outer periphery in this way moves to the wire cutting position by the rotation of the rotating body 33 of the index device 30.
[0048]
In the coil 4 wound around the outer periphery of the winding core 35B at the wire cutting position, the lead portions 51 and 52 on both sides are cut. This cutting method will be described in detail. First, the cutting device 40 is advanced to the core 35B side, and the winding start side lead portion 51 and the winding end side lead portion 52 of the coil 4 are gripped by the gripping devices 46 and 47, respectively. . In this state, the lead portions 51 and 52 are cut by lowering the cutters 44 and 45.
[0049]
In this case, the blade portions 44A and 45A of the cutters 44 and 45 are all inclined so as to face the proximal end side of the winding core 35B. Therefore, since the lead portions 51 and 52 can be cut with a small pressing force corresponding to the inclination, smooth cutting is performed, and the wire 3 is cut at a portion other than the portion of the lead portions 51 and 52 to be cut. There is no. Further, at the time of cutting, the base portion 4A of the lead portion 51 is adjacent to the outer end surface 34A of the core accommodating cylinder 34 and the base portion 4B of the lead portion 52 is adjacent due to the component force of the pressing force generated by the inclination of the blade portions 44A and 45A. Since the coil 4 is pressed against the wire 4C, the coil 4 is stable in position and can perform a stable cutting operation.
[0050]
The coil 4 from which the lead parts 51 and 52 have been cut is transferred to the coil discharge position by the index device 30 and collected in the coil collection box 5.
[0051]
6 and 7 show another embodiment of the present invention. This embodiment differs from the above-described embodiment shown in FIGS. 1 to 5 in the configuration of the cutter of the cutting device 40, and is common in other configurations.
[0052]
As shown in FIG. 6, in this Embodiment, the upper cutter 60 and the lower cutter 70 are provided in the opposing state from the upper and lower sides as a cutter of the cutting device 40.
[0053]
The upper cutter 60 is an inverted concave member, and the lower portions of the two surfaces extending substantially parallel to the lower side thereof are cutter portions 61 and 62, respectively. The lower end portions of these cutter portions 61 and 62 are substantially horizontal blade portions 61A and 62A.
[0054]
The lower cutter 70 is a member obtained by cutting out the upper surface portion of a rectangular parallelepiped into a V shape, and the two convex portions formed by the cutout are cutter portions 71 and 72. The tops of these cutter parts 71 and 72 are blade parts 71A and 72A.
[0055]
The upper cutter 60 and the lower cutter 70 are detachably attached to a drive mechanism (not shown) via support shafts 63 and 73, respectively, and are driven in the vertical direction. The lead portions 51 and 52 are sandwiched from above and below by the blade portions 61A and 62A of the upper cutter 60 and the blade portions 71A and 72A of the lower cutter 70 by the vertical movement of the upper cutter 60 and the lower cutter 70, respectively. Disconnected.
[0056]
In the present embodiment, unlike the above embodiments, the base ends of the lead portions 51 and 52 are arranged below the core 35B.
[0057]
In such a cutting operation, the upper cutter 60 or the lower cutter 70 is exchanged for an appropriate size according to how the shape of the coil 4 after cutting is desired, and the upper cutter 60 and the lower cutter 70 at the time of cutting are replaced. The positional relationship of the side cutter 70 is adjusted.
[0058]
Specifically, as shown in FIG. 7A, when it is desired to bring the cut ends of the lead portions 51 and 52 of the coil 4 to the base end side of the lead portions 51 and 52, the upper cutter 60 is used as the cutter. The distance between the blade parts 61A and 62A of the parts 61 and 62 is substantially the same as the distance between the blade parts 71A and 72A of the cutter parts 71 and 72 of the lower cutter 70, or slightly smaller than the distance between the blade parts 71A and 72A. Select a narrower one. And the lower cutter 70 is arrange | positioned below the core 35B only the distance according to the angle which inclines the lead parts 51 and 52 below. In this state, the lead parts 51 and 52 are cut by lowering the upper cutter 60 from above.
[0059]
On the other hand, as shown in FIG. 7B, when it is desired to bring the cut ends of the lead portions 51 and 52 of the coil 4 to the side opposite to the base end portions of the lead portions 51 and 52, as the upper cutter 60, The distance between the blade parts 61A and 62A of the cutter parts 61 and 62 is substantially the same as the distance between the blade parts 71A and 72A of the cutter parts 71 and 72 of the lower cutter 70, or more than the distance between the blade parts 71A and 72A. Select a slightly wider one. And the position with respect to the core 35B of the lower cutter 70 is determined so that the coil 4 may just be arrange | positioned in the recessed part formed of the two cutter parts 71 and 72 of the lower cutter 70. FIG. In this state, the lead cutters 51 and 52 are cut by lowering the upper cutter 60.
[0060]
Thus, according to the present embodiment, the lead portions 51 and 52 are sandwiched and cut by the upper cutter 60 and the lower cutter 70 from above and below, so that stable cutting can be performed, and the upper cutter 60 and the lower cutter 60 can be cut. By adjusting the size and position of the side cutter 70, the cut lead portions 51 and 52 can be formed in a desired shape.
[Brief description of the drawings]
FIG. 1 is an overall view of a winding device in an embodiment of the present invention.
FIG. 2 is a perspective view of the main part of the winding device.
FIG. 3 is a plan view of a part of the index device.
FIG. 4 is a perspective view showing a cut of the lead portion in the same manner.
FIG. 5 is a cross-sectional view showing a cut of the lead portion.
FIG. 6 is a perspective view showing a cutting device according to another embodiment of the present invention.
FIG. 7 is an explanatory view showing the cutting of the lead portion in the same manner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Winding device 3 Wire rod 4 Coil 20 Flyer type winding mechanism 30 Index device 35 Core 40 Cutting device 44 Cutter 44A Blade part 45 Cutter 45A Blade part 46 Gripping device 47 Gripping device 51 Lead part 52 Lead part 60 Upper cutter 61 Cutter Part 61A Blade part 62 Cutter part 62A Blade part 70 Lower cutter 71 Cutter part 71A Blade part 72 Cutter part 72A Blade part

Claims (8)

In the coil lead cutting method of cutting the lead portion of the coil wound around the core with a cutter,
The pressing force acting on the lead portion from the cutter is composed of a resultant force of a force in a direction in which the lead portion is wound around the core and a force in a direction in which the coil is pressed against the proximal end of the core. A method of cutting a coil lead, wherein the blade portion of the cutter is tilted in an operation direction during cutting.   The wire rod at the base end of the lead portion is supported from the opposite side to the direction in which the blade portion of the cutter faces with respect to the force acting at the time of cutting based on the inclination of the blade portion. Item 4. The coil lead cutting method according to Item 1.   The wire rod at the base end of the lead portion is supported by a support surface with which the coil end portion is in contact with a force acting at the time of cutting based on the inclination of the blade portion. Cutting method of coil lead.   The wire rod at the base end of the lead portion is supported by the adjacent wire rod against the force acting at the time of cutting based on the inclination of the blade portion. Cutting method of coil lead. A gripping means for gripping the lead portion of the coil wound around the core;
A cutter for cutting the lead portion between the gripping means and the coil;
In the coil lead cutting device comprising:
The blade portion of the cutter has a pressing force acting on the lead portion from the cutter, a force in a direction to wind the lead portion around the core, and a force in a direction to press the coil against the proximal end of the core. A coil lead cutting device, wherein the coil lead cutting device is tilted in an operation direction at the time of cutting so as to have a resultant force .   The wire rod at the base end of the lead portion is supported from the opposite side to the direction in which the blade portion of the cutter faces with respect to the force acting at the time of cutting based on the inclination of the blade portion. Item 6. The coil lead cutting device according to Item 5.   The wire rod at the base end of the lead portion is supported by a support surface with which the coil end portion is in contact with the force based on the inclination of the blade portion acting at the time of cutting. Coil lead cutting device.   The wire rod at the base end of the lead portion is supported by an adjacent wire rod against a force based on the inclination of the blade portion acting at the time of cutting. Coil lead cutting device.

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